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ATV Modulator: fixed calculation on sample rate change

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This commit is contained in:
f4exb 2017-03-26 11:54:18 +02:00
parent aa8ef5e791
commit eb47a29f4a
2 changed files with 29 additions and 15 deletions
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40
plugins/channeltx/modatv/atvmod.cpp
View File

@ -84,12 +84,10 @@ ATVMod::ATVMod() :
m_DSBFilterBuffer = new Complex[m_ssbFftLen];
memset(m_DSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen));
applyStandard();
m_interpolatorDistanceRemain = 0.0f;
m_interpolatorDistance = 1.0f;
apply(true);
apply(true); // does applyStandard() too;
m_movingAverage.resize(16, 0);
}
@ -691,10 +689,19 @@ void ATVMod::apply(bool force)
|| (m_config.m_atvModulation != m_running.m_atvModulation) || force)
{
int rateUnits, nbPointsPerRateUnit;
getBaseValues(m_config.m_nbLines * m_config.m_fps, rateUnits, nbPointsPerRateUnit);
getBaseValues(m_config.m_outputSampleRate, m_config.m_nbLines * m_config.m_fps, rateUnits, nbPointsPerRateUnit);
m_tvSampleRate = (m_config.m_outputSampleRate / rateUnits) * rateUnits; // make sure working sample rate is a multiple of rate units
m_pointsPerLine = (m_tvSampleRate / rateUnits) * nbPointsPerRateUnit;
// qDebug() << "ATVMod::apply: "
// << " m_nbLines: " << m_config.m_nbLines
// << " m_fps: " << m_config.m_fps
// << " rateUnits: " << rateUnits
// << " nbPointsPerRateUnit: " << nbPointsPerRateUnit
// << " m_outputSampleRate: " << m_config.m_outputSampleRate
// << " m_tvSampleRate: " << m_tvSampleRate
// << " m_pointsPerTU: " << m_pointsPerTU;
m_settingsMutex.lock();
if (m_tvSampleRate > 0)
@ -715,7 +722,7 @@ void ATVMod::apply(bool force)
memset(m_SSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen>>1));
m_SSBFilterBufferIndex = 0;
applyStandard(); // set all timings
applyStandard(rateUnits, nbPointsPerRateUnit); // set all timings
m_settingsMutex.unlock();
MsgReportEffectiveSampleRate *report;
@ -767,17 +774,18 @@ void ATVMod::apply(bool force)
m_running.m_forceDecimator = m_config.m_forceDecimator;
}
void ATVMod::getBaseValues(int linesPerSecond, int& sampleRateUnits, int& nbPointsPerRateUnit)
void ATVMod::getBaseValues(int outputSampleRate, int linesPerSecond, int& sampleRateUnits, int& nbPointsPerRateUnit)
{
int i = 0;
int maxPoints = outputSampleRate / linesPerSecond;
int i = maxPoints;
for (; i < 100; i++)
for (; i > 0; i--)
{
if (((100+i) * linesPerSecond) % 1000 == 0)
if ((i * linesPerSecond) % 1000 == 0)
break;
}
nbPointsPerRateUnit = (i == 100) ? 100 : 100+i;
nbPointsPerRateUnit = i;
sampleRateUnits = nbPointsPerRateUnit * linesPerSecond;
}
@ -798,10 +806,8 @@ float ATVMod::getRFBandwidthDivisor(ATVModulation modulation)
}
}
void ATVMod::applyStandard()
void ATVMod::applyStandard(int rateUnits, int nbPointsPerRateUnit)
{
int rateUnits, nbPointsPerRateUnit;
getBaseValues(m_config.m_nbLines * m_config.m_fps, rateUnits, nbPointsPerRateUnit);
m_pointsPerTU = m_tvSampleRate / rateUnits; // TV sample rate is already set at a multiple of rate units
m_pointsPerSync = (uint32_t) roundf(4.7f * m_pointsPerTU); // normal sync pulse (4.7 us / rateUnits)
@ -819,6 +825,14 @@ void ATVMod::applyStandard()
m_nbLines2 = (m_nbLines / 2) + 1;
m_fps = m_config.m_fps * 1.0f;
// qDebug() << "ATVMod::applyStandard: "
// << " m_nbLines: " << m_config.m_nbLines
// << " m_fps: " << m_config.m_fps
// << " rateUnits: " << rateUnits
// << " nbPointsPerRateUnit: " << nbPointsPerRateUnit
// << " m_tvSampleRate: " << m_tvSampleRate
// << " m_pointsPerTU: " << m_pointsPerTU;
switch(m_config.m_atvStd)
{
case ATVStd405: // Follows loosely the 405 lines standard

4
plugins/channeltx/modatv/atvmod.h
View File

@ -404,7 +404,7 @@ public:
Real getMagSq() const { return m_movingAverage.average(); }
void getCameraNumbers(std::vector<int>& numbers);
static void getBaseValues(int linesPerSecond, int& sampleRateUnits, int& nbPointsPerRateUnit);
static void getBaseValues(int outputSampleRate, int linesPerSecond, int& sampleRateUnits, int& nbPointsPerRateUnit);
static float getRFBandwidthDivisor(ATVModulation modulation);
signals:
@ -699,7 +699,7 @@ private:
void modulateSample();
Complex& modulateSSB(Real& sample);
Complex& modulateVestigialSSB(Real& sample);
void applyStandard();
void applyStandard(int rateUnits, int nbPointsPerRateUnit);
void openImage(const QString& fileName);
void openVideo(const QString& fileName);
void resizeImage();